﻿//-----------------------------------------------------------------------
// <copyright company="www.3WayWebdesign.de">
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
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//
// The above copyright notice and this permission notice shall be
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// </copyright>
//
// <author>Michael Morbach</author>
// <email>Michael@3waywebdesign.de</email>
// <web>http://www.3waywebdesign.de</web>
//-----------------------------------------------------------------------

namespace Tww.IBAN.IBANUtilities.Constants
{
    #region Imports

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;


    #endregion

    public class CharTransformationChart
    {
        /// TransformationChart for chars in IBAN
        /// Also see : http://www.pruefziffernberechnung.de/I/IBAN.shtml
        private static Dictionary<char, int> transformationChart = new Dictionary<char, int>()
        {
            {'a', 10 }, {'b', 11 }, {'c', 12 }, {'d', 13 }, {'e', 14 }, {'f', 15 }, {'g', 16 }, {'h', 17 }, {'i', 18 }, {'j', 19 }, {'k', 20 },
            {'l', 21 }, {'m', 22 }, {'n', 23 }, {'o', 24 }, {'p', 25 }, {'q', 26 }, {'r', 27 }, {'s', 28 }, {'t', 29 }, {'u', 30 },
            {'v', 31 }, {'w', 32 }, {'x', 33 }, {'y', 34 }, {'z', 35 }
        };

        /// <summary>
        /// Gets the TransformationChart
        /// </summary>
        public static Dictionary<char, int> TransformationChart { get { return transformationChart; } }

        /// <summary>
        /// Transforms a string with letters to a number and returns it as string
        /// </summary>
        /// <param name="input">Inputstring with letters</param>
        /// <returns>Number as string</returns>
        public static string TransformToString( string input )
        {
            var transformation = new StringBuilder();

            foreach ( var character in input )
            {
                int value = 0;
                transformation.Append( ( TransformationChart.TryGetValue( char.ToLower( character ), out value ) ) ? value.ToString() : character.ToString() );
            }

            return transformation.ToString();
        }

        /// <summary>
        /// Transforms a string with letters to a number and returns it as string
        /// </summary>
        /// <param name="input">Inputstring with letters</param>
        /// <returns>Number as long</returns>
        public static long TransformToLong( string input )
        {
            return long.Parse( TransformToString( input ) );
        }

        /// <summary>
        /// Removes all unnecessary chars from this iban
        /// </summary>
        /// <param name="iban">IBAN to clean</param>
        /// <returns></returns>
        public static string NormalizeIBAN( string iban )
        {
            return iban.Replace( " ", string.Empty ).Trim();
        }
    }
}
